Graph3DC for the TI-84 Plus C Silver Edition lets you graph 3D functions on your graphing calculator, a function missing from TI's own TI-OS. It integrates with the TI-OS so you can either graph 3D equations or continue to use the built-in 2D graphing tools. You can graph between 1 and 5 functions simultaneously, control the appearance of graphs including color, background color, axes, set the window, zoom in and out, and more. Because Graph3DC integrates fully with the TI-OS, you can even set your calculator into Horizontal splitscreen mode and view 3D plots and the homescreen simultaneously.